Koninklijke Philips Corporation N.v.

Eric Franciscus Johannes Claessens

Johannes Wilhelmus Weekamp

Hendrik Roelof Stapert

Willem-Jan Arend De Wijs

Cornelis Gerardus Visser

Jan Harm De Boer

Gerardus Franciscus Cornelis Maria Lijten

Patrick Wilhelmus Van Kaam

Ioannis Pappous

A medical sensing system () includes an elongate interventional device () and an adjustable capacitance circuit (). The elongate interventional device () includes a sensor () having a capacitance (C). The elongate interventional device () also includes a first electrical conductor () and a second electrical conductor (). The first electrical conductor () and the second electrical conductor () are in electrical contact with the sensor () and extend along the elongate interventional device (). The elongate interventional device () also includes i) an electrically conductive shield () that overlaps the electrical conductors () and/or ii) an electrically conductive shaft (). The adjustable capacitance circuit () provides an adjustable capacitance (C, C) between at least one of the electrical conductors () and i) the electrically conductive shield () that overlaps the electrical conductors () and/or ii) the electrically conductive shaft ().

Reducing sensor interference in a medical device

An interventional device includes an elongate shaft and a transducer strip. The transducer strip includes a first edge and an opposing second edge. The first edge and the second edge are separated by a width dimension, and the first edge and the second edge each extend along a length direction of the transducer strip. The transducer strip also includes a piezoelectric transducer that extends along a transducer direction that forms an acute angle with respect to the length direction. The transducer strip is wrapped in the form of a spiral around the elongate shaft of the interventional device such that the piezoelectric transducer forms a band around the elongate shaft. The width dimension is defined such that the adjacent first and second edges of consecutive turns of the spiral abut or overlap one another.

Interventional device with piezoelectric transducer

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Helmond, Netherlands

Eric Franciscus Johannes Claessens